Currently, the Wiki's category structure is a mess
We (that means you too) are going to improve it. Please review the current proposal(s) here: Main Page Discussion Area
During the Wiki Contest (which will be concluded on the 7th of Jan. and winners announced on the 11th), we are unable to edit articles we did not create so please comment here. This may also help give you ideas if you are still trying to think of something to write for the Wiki Contest.